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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
#define GMOUSE_DRIVER_VMT GMOUSEVMT_MAX11802
#include "src/ginput/driver_mouse.h"
#define GMOUSE_MAX11802_FLG_TOUCHED (GMOUSE_FLG_DRIVER_FIRST << 0)
// Hardware definitions
#include "drivers/ginput/touch/MAX11802/max11802.h"
// Get the hardware interface
#include "gmouse_lld_MAX11802_board.h"
// Last values read from A-D channels
static uint16_t lastx, lasty;
static uint16_t lastz = { 100 << 4 }; // This may not be used, so initialise it (value is bits 15..4)
static bool_t MouseInit(GMouse* m, unsigned driverinstance)
{
uint8_t ret;
const uint8_t commandList[][2] = {
{ MAX11802_CMD_GEN_WR, 0xf0 }, // General config - leave TIRQ enabled, even though we ignore it ATM
{ MAX11802_CMD_RES_WR, 0x00 }, // A-D resolution, hardware config - rewriting default; all 12-bit resolution
{ MAX11802_CMD_AVG_WR, MAX11802_AVG }, // A-D averaging - 8 samples, average four median samples
{ MAX11802_CMD_SAMPLE_WR, 0x00 }, // A-D sample time - use default
{ MAX11802_CMD_TIMING_WR, MAX11802_TIMING }, // Setup timing
{ MAX11802_CMD_DELAY_WR, MAX11802_DELAY }, // Conversion delays
{ MAX11802_CMD_TDPULL_WR, 0x00 }, // A-D resolution, hardware config - rewrite default
//{ MAX11802_CMD_MDTIM_WR, 0x00 }, // Autonomous mode timing - write default
//{ MAX11802_CMD_APCONF_WR, 0x00 }, // Aperture config register - rewrite default
// Ignore aux config register - not used
{ MAX11802_CMD_MODE_WR, MAX11802_MODE }, // Set mode last
};
if (!init_board(m, driverinstance))
return FALSE;
aquire_bus(m);
for (ret = 0; ret < (sizeof(commandList) / (2 * sizeof(uint8_t))); ret++) {
write_command(m, commandList[ret][0], commandList[ret][1]);
}
ret = write_command(m, MAX11802_CMD_MODE_RD, 0); // Read something as a test
if (ret != MAX11802_MODE) {
// Error here - @TODO: What can we do about it?
}
release_bus(m);
}
static void read_xyz(GMouse* m, GMouseReading* pdr)
{
uint8_t readyCount;
uint8_t notReadyCount;
// Assume not touched.
pdr->buttons = 0;
pdr->z = 0;
aquire_bus(m);
#if MAX11802_READ_Z_VALUE
gfintWriteCommand(m, MAX11802_CMD_MEASUREXYZ); // just write command
#else
gfintWriteCommand(m, MAX11802_CMD_MEASUREXY); // just write command
#endif
/**
* put a delay in here, since conversion will take a finite time - longer if reading Z as well
* Potentially 1msec for 3 axes with 8us conversion time per sample, 8 samples per average
* Note Maxim AN5435-software to do calculation (www.maximintegrated.com/design/tools/appnotes/5435/AN5435-software.zip)
*
* We'll just use a fixed delay to avoid too much polling/bus activity
*/
gfxSleepMilliseconds(2); // Was 1 - try 2
/* Wait for data ready
* Note: MAX11802 signals the readiness of the results using the lowest 4 bits of the result. However, these are the
* last bits to be read out of the device. It is possible for the hardware value to change in the middle of the read,
* causing the analog value to still be invalid even though the tags indicate a valid result.
*
* We work around this by reading the registers once more after the tags indicate they are ready.
* There's also a separate counter to guard against never getting valid readings.
*
* Read the two or three readings required in a single burst, swapping x and y order if necessary
*/
readyCount = 0;
notReadyCount = 0;
do {
gfintWriteCommand(m, MAX11802_CMD_XPOSITION); // This sets pointer to first byte of block
#if defined(GINPUT_MOUSE_YX_INVERTED) && GINPUT_MOUSE_YX_INVERTED
lasty = read_value(m);
lastx = read_value(m);
#else
lastx = read_value(m);
lasty = read_value(m));
#endif
#if MAX11802_READ_Z_VALUE
lastz = read_value(m);
if (((lastx & 0x0f) != 0xF) && ((lasty * 0xf0) != 0xF) && ((lastz * 0xf0) != 0xF))
#else
if (((lastx & 0x0f) != 0xF) && ((lasty * 0xf0) != 0xF))
#endif
{
readyCount++;
}
else
{
notReadyCount++; // Protect against infinite loops
}
} while ((readyCount < 2) && (notReadyCount < 20));
/**
* format of each value returned by MAX11802:
* Bits 15..4 - analog value
* Bits 3..2 - tag value - measurement type (X, Y, Z1, Z2)
* Bits 1..0 - tag value - event type (00 = valid touch, 10 - no touch, 11 - measurement in progress)
*/
pt->x = lastx >> 4; // Delete the tags
pt->y = lasty >> 4;
pt->z = lastz >> 4; // If no Z-axis, lastz has been initialised to return 100
pt->buttons = ((0 == (lastx & 3)) && (0 == (lasty & 3)) && (0 == (lastz & 3))) ? GINPUT_TOUCH_PRESSED : 0;
release_bus(m);
}
const GMouseVMT const GMOUSE_DRIVER_VMT[1] = {{
{
GDRIVER_TYPE_TOUCH,
GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN | GMOUSE_VFLG_CALIBRATE | GMOUSE_VFLG_CAL_TEST,
sizeof(GMouse) + GMOUSE_MAX11802_BOARD_DATA_SIZE,
_gmouseInitDriver,
_gmousePostInitDriver,
_gmouseDeInitDriver
},
255, // z_max
0, // z_min
20, // z_touchoff
200, // z_touchon
{ // pen_jitter
GMOUSE_MAX11802_PEN_CALIBRATE_ERROR, // calibrate
GMOUSE_MAX11802_PEN_CLICK_ERROR, // click
GMOUSE_MAX11802_PEN_MOVE_ERROR // move
},
{ // finger_jitter
GMOUSE_MAX11802_FINGER_CALIBRATE_ERROR, // calibrate
GMOUSE_MAX11802_FINGER_CLICK_ERROR, // click
GMOUSE_MAX11802_FINGER_MOVE_ERROR // move
},
MouseInit, // init
0, // deinit
read_xyz, // get
0, // calsave
0 // calload
}};
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
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